Fix: Fixed an issue when navigating the sidebar using the tab key

[priadiliav]

Resolved / Related Issues

Note: The solution to the issue was a simple change: setting the IsTabStop attribute to False. This was necessary as we were excluding focus from each selected element.

• Closes Bug: Focus indicator not displayed when navigating in the sidebar using keyboard #16145

Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.

1. Opened Files
2. Press "Tab" (You can see focused element)
3. Use the 'Down' and 'Up' arrow keys (you won't be able to see the focused element, but it will change. When you press 'Tab' again, you will see the border on the element where the focus is. If you try to move to the next element, it will change, but without a visible border)."

[yaira2]

Is ElementGrid still a tab stop? We should confirm that only one element is a top stop.

[priadiliav]

Honestly, I'm not entirely sure I understood the question, but i recorded a video to demonstrate it.

Network.2.-.Files.2024-09-30.00-11-06.mp4

[yaira2]

The border contains a grid, we need to confirm that only one of the elements is treated as a tab stop.

[yaira2]

LGTM